Fluid transmission system



July 25, 1933. R. P. PESCARA FLUID TRANSMISSION SYSTEM Filed June 2,1927 Patented July 25, 1933 UNITED STATES RAUL IPATERASIESCARA, OFPARIS, FRANCE FLUID TRANSMISSION SYSTEM Applicatlonflled'lune 2, 1927,Serial No. 195,982, and in France June 21, 1826.

My invention relates to improvements in motor compressor apparatus usedin connection with motors or turbines operated by the fluid compressedthereby, and the object of my invention lies in the provision of certainnovel forms, construction, and combination of parts for providingreliable devices for the purposes stated and to cheapen the cost ofmanufacture, all of which will hereinafter be fully described andclaimed.

A further object of my invention is to provide a device of the characterindicated which shall be particularly applicable to the devices formingthe sub ect of the invention described in my co-pending applicationSerial No. 177,938 filed March 24th 1927, and my United States PatentsNos. 1,747 948, 1,732,693, 1,732,694 and 1,766,382, to which this is acompanion application.

Other objects of the invention will be obvious to those skilled in theart to which it relates in the following description taken in connectionwith the accompanying drawing in which- The single figure represents adiagrammatic plan View of an apparatus constructed in accordance withthe present invention.

Referring to the drawing, 10 represents the compressor cylinders of amain internal combustion motor compressor, in which direct actingpistons similar to those shown in the specification of my United StatesPatent No. 1,732,693 are mounted to move in op- ,posite directions, thesaid pistons having 5 combined therewith compressor pistons working intheir associated cylinders, the

return strokes of the pistons being effected by compressed aircoming inthe spaces between the ends of the compressor pistons and the deliveryends of the compressor cylinders, said pistons being synchronized by amechanism similar to that disclosed in my above mentioned United StatesPatent No. 1,747,948, the said motor cylinders com- 5 municating with afluid motor 11 which may be a turbine of any appropriate kind.

A compressed gas tank 12 which operates under low pressure receives atone end the exhaust gases of the motor 11 through the I pipe 13 and thecooler 14 and feeds the compressor cylinders 10 through the pipes 15 and16. This cooler 14 has for ob ect to lead gases which are as cold aspossible to the reservoir 12 in order to supply the compressor side ofthe motor compressor under the best yield conditions. The tank is alsoplaced in communication with the motor cylinder of compressor cylinders10 through a small condensin cooler 17, a pipe 18 and two automatlcvalves 19 and 20. The condensingcooler 17 comprises a casing havinglocated therein a plurality of openended tubes 30 carried by diaphragmsat the ends of the tubes, extending completely across the interior ofthe casing. The diaphra'gms are perforated to receive the ends of thetubes (as shown at one end) to form a jacketed space around the tubes.This space has an inlet conduit 28 and an outlet conduit 29 throughwhich and the jacketed space an appropriate fluid such as air or wateris circulated in the direction of the arrows, the arrangement being suchthat exhaust gases can pass from the motor cylinder through theautomatic valves 19 and 20 and pipe 18 into the cooler 17 the said gasespassing through the cooled tubes 30 and. into the tank 12. The orifices21, 22 controlled by said valves are located in the wall of said motorcylinder. The orifices 21 and 22 are so disposed in the motor cylinderof the compressor with respect to the driving pistons thereof that atthe moment when the pressure of the burned gases in said motor cylinderis equal to the pressure which must normally prevail in the low pressuretank 12 said orifices will be uncovered by the pistons during theirexpansion stroke.

A high pressure gas tank 23 receives the fluid compressed by thecompressor cylinders 10 through the pipes 24 and 25 and feeds the motor11 through the pipe 26.

The system is supplied with an inert gas as a circulating fluid, thatis, a gas which does not support combustion. The gas I use is taken fromthe exhaust pipe of the motor cylinder of the compressor previouslycooled and separated out from its water of condensation. The operationof my apparatus takes place as follows:

The motor compressor draws in the fluid contained in the tank 12,-continually, compresses it and pushes it back in the tank 23. The motor11 receives this fluid at high pressure by the tube 26 and exhaustsafter expansion at low pressure and cooling in thecooler 14, into thetank 12 by way of the conduit 13. The cooler 14: is similar in structureto the cooler 17 and is cooled by the circulation'therethrough in thedirection of the arrows of an appro riate fluid such as air or water,and has or a purpose to continually throw off the surplus heat containedin the gas after expansion and accomplishment of work in the motor 11,so

the orifices 21, 22 are uncovered by the motor pistons and when thepressure inthe motor cylinder is slightly in excess of that in the tankshould the pressure in the tank be less than that required, the valves19 and 20 are raised and inert gas penetrates the tank 12 after passingthrough the cooler 17 which both lowers its temperatures and condensesthe water held in suspension therein. The draincock 27 is provided fordrawing off this water of condensation at suitable intervals. In thismanner the pressure in tank 12 is constantly maintained in theneighborhood of its normal value. For

example, if the pressure in the reservoir 12 drops, by reason ofleakages in the channels below a predetermined value, e. g., 71 poundsper square inch, at which pressure it balances the valves 19 and 20, thesaid valves are so loaded that the pressure of exhaust gases in themotor cylinder will operate to open the valves to allow the gas to passto thecylinder 12. When, however, the pressure of the gas in thecylinder 12 reaches its predetermined value, 1. e., 71 pounds per squareinch, this ressure will 'maintain the valves '19 and 20 c osed and theburnt gases are evacuated from the inotor cylinder by the o ening of theordinary exhaust outlets of t e said cylinder.

Many variations in my apparatus may be made by those skilled in the artwithout departing from my invention, since What I claim is- In a powertransmission system employing a gas compressor worked directly byinternal combustion and having a piston moving freely in a cylinder, anda closed circuit containin an inert gas, a high pressure tank into wiichthe compressor feeds, a low pressure tank from which the compressortakes its supply, a fluid motor fed from said high pressure tank andexhausting into the low pressure tank, that portion of the cylinder inwhich the combustion takes place having outlet apertures and passagesleading from said apertures to the low pressure tank, and non-returnvalves associated with said apertures and passages whereby the desiredpressure in the closed circuit is maintained.

RAUL PATERAS PESCARA.

